If I'm correct after talking with a friend of mine who competed in Robot Wars 7(I will keep him anonymous), I've come to the following conclusions:

1: Dominator 2 was seeded 5th, via it losing to Hypno-Disc but regaining its seeding via defeating Hypno-Disc.

2: If you want to find out about those 2 robots, send a PM to Tom Kane, as he's on the Kan Opener team and would probably remember them.

3: I don't think that the Eddie Evolution team made another robot...

4: I really don't know what the stats were. If you want to find out, PM some of these forum members who competed in series 5, and they might be able to help you.